Radioactive minerals of alluvial piacers of the Amur river region as concentrators of noble metals (by the example of Nizhneselemdzhinsky gold-bearing knot)

Data on mineral composition of the Amur river Region placers and radioactive mineral content in them are provided. It´s been established that the high content of zircon and a monocyte are characteristic of alluvial placers of Nizhneselemdzhinsky gold-bearing knot. It´s been proved that there is a concentration of thorium and uranium in minerals, as well as gold and silver. These minerals have the increased radioactivity, and the amount of gold in them in some times exceeds abundance of this element in Eacth´s crust.